OFFSET
1,1
COMMENTS
Column 2 of A251351
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 16*a(n-1) -27*a(n-2) -173*a(n-3) +362*a(n-4) -61*a(n-5) -144*a(n-6) +48*a(n-7)
EXAMPLE
Some solutions for n=3
..2..1..2....2..0..2....1..0..1....0..2..1....1..2..1....0..1..0....1..0..2
..0..1..0....1..2..0....1..1..1....0..2..0....1..1..0....1..1..1....2..0..1
..2..1..1....1..0..1....0..1..1....2..1..0....2..1..1....1..2..1....2..1..1
..2..0..1....1..1..2....0..2..1....1..1..1....2..0..1....1..0..2....0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 01 2014
STATUS
approved